Die head for threading machines and the like



Oct. 19,1926.

f I 1,603,280 L. S. HALL A-DIE HEAD FOR THREADING MACHINES AND THE LIKE Filed March 2 1925 INVENTOR 4554/5 6. #441.

" Pa'tented a; ia'ieze.

primarily 'to that type L E S-JHALL e 1:1 pm]:'rqa mnmmmiMadame ams A uaata lfiiea Maren-e5, 1925f SeriaI NOi ISQSl),

My invention relates to machineryjiand or bolt threading machine.

I The primary object of my invention isto;

provide a simplified die head' for' a machine of this characterincluding a novel means I for setting thendiescorthread cutting-tools i in various positions-for threading pipe of different sizes. 7 I

Another object is, to provide a simple and effective means for locking the dies intheir I set or adjusted position.

Another object contemplates the provision of means for locking the dies as a part of the setting unit.

A still further object is to place the die operatingand locking tmit in such position as to enable the operatorto readily manipulate the various parts easily andquickly,

Other objects and advantages in details of construction and operation will be ap parent as the description proceeds, reference being had to the accompanying drawings wherein like reference numerals indicate like arts. 1 "In the drawing: Y Figure 1 is a side'view'of my improved diehead.

ring is cut away at various points Figure 2 1s a front view thereof, certain parts bemg'removed for clearness of illustration. V v

Figure '3 isa detail side view, partly in" section, showing the operation of the die setting means. a p

The carriage of my improved "die head is indicated generally by the reference numeral 1 and is adapted to slide on ways of the machine (notshown) to which it is ap plied. The carriage 1 is provided with a;

tendency for the cam ring f to SllPOIl its" vided on its front face with a protruding bearing surface 3, for rotatably supporting an operating ring 4:, hereinafter called the cam ring. A cover plate 5 is mounted by bolts 6 to the supporting structure 2 and retains the cam ring f in proper position on its bearing. V

As will be noted from Figure 2, the. cam as as'7, to reduce theweight of the same. The cam ring 4 is also provided on its face" with eccentric cam ridges 8, adapted to'engage 1n notches 9, in one of the sides of the chasers or thread cutting dies '10. -The chasers 1.0

are mou t d f r l ng m vem n nt and nection 8 and 9.

cessesprovided in the projecting inember" 3 .of the support 2. It will be understood therefore thatr rotation of1the"cam ring 4 a A i ,1r s tvAN A, ASS 'N ia60 wittmnsebot 0631 034, "we f? sa B N SYW M 1 v gout of work engaging position,* that is, to if i and away from the; openin ill in'the head, thru'whiclifthe pipe or other 'work to bef threaded-projects, by means of; slots or re- 1 will result in 'such sliding move'inentby -the chasers 10, due to the'ridgeand notch con- The cam ring 4 isprovided with an elongated bearing 18 secured thereto as by bolt 14, through which extends a screw shaft 15 provided at its outer end with a handle or I turning .piece 16. The lower end 17 of the shaft 15 adapted toengage with the upperend of a'loosely mounted pin 18, slidable in a bushing1-9,carried by the cam will be" forced into engagementv wtih the bearing surface 3, vthereby tightly locking the cam ring from further rotation. Con-. versely,.whenthe screw shaft1-5 is rotated in the opposite direction, the pressure on the pin 18 will be relieved and the cam ring "4B is freelyretatable on the bearing surface 8, whereby to adjust the position of the dies. In order to prevent possible slipping of ring fl. The lower end 20 of this pin 18 rests upon and engages with the bearing surface .3. 1 It will be understood therefore 1' fthatupon turningthe handmember 16 to push the 'sh'aft' 15 downwardly, the pin 18 the cam ring i on its 'bearingsurface, due to pressure of the work or threading operation, the section of the bearingsurface 3 with which the lower end 20 of the pin' 18 engages, has been formed slightly ecat 21. Therefore, if there should be any bearing afterbeing locked, the eccentric surface 21 of the bearing acting as a wedge,-

centric to the center as shown in Figure, 2, V

cooperates with the lower end 20 of the pin 18 to positively prevent such slipping.

i It will be noticed that my improved op erating means for the cam ring for setting the chasers, and the locking means therefor are combined in a single unit; The operator therefore need use but onehand for both of V I these operations. The hand vwheel 16 turns the screw 15 to unlock the pin 18 and, using the hand wheel 16 and the bearing 13 asfa be required, is possible without changing handle,- rotation of the cam ring 4 in the desired directionito adjust the dies as'it may j position. Again turning the hand wheel 1.6

to the night, locksathe cam in its v adjustedposition.

From the foregoing description it willbe understood'that "I have -provided an'ove'l" type of die head for threadingunachines,

which is a distinctin provernent over those heretofore used. f course the form shown and described is the preferredembodiment.

only and is susceptible to Various changes in details of. construction .and operation, with out-departing fromthe spirit and scope of the invention. I'do not. limit tinyselfitherefore to the form shown other than :by vthe appended claims.

'I claim: I V 1.- In combination with a die head including-ahead stock and a rotatable. carnring thereon, an upstanding hearingon .saidring,

a screw threaded shaft rotatable in said20 bearing and provided at its outer end with hand gr rgpingHmeans, ..and means at. the.

lower .endofisaidsh'aft for engaging a' surbeaningand provided ,at :its outer end with hand 'ri in means and a loosel mounted P pin in said ring engageableat oneend with the lower end ofsaid-shaft; and at the op.

posite-end with an eccentric surface of "said head stock.- v I LESLIE S. HALL. 

